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| 1 | Catalytic effect of Ni@rGO on the hydrogen storage properties of MgH2显示文摘Uniform-uispersed Ni nanoparticics(NPs)anchored on reduced graphene oxide(Ni@rGO)catalyzed MgH2(MH-Ni@rGO)has been fabricated by mechanical milling.The effects of milling time and Ni loading amount on the hydrogen storage properties of MgH2 have been investigated.The initial hydrogen desorption temperature of MgH2 catalyzed by 10 wt.%Ni4@rGO6 for milling 5 h is significantly decreased from 251℃ to 190℃.The composite can absorb 5.0 wt.%hydrogen in 20 min at 100℃,while it can desorb 6.1 wt.%within 15 min at 300℃.Through the investigation of the phase transformation and dehydrogenation kinetics during hydrogen ab/desorption cycles,we found that the in-situ formed Mg2Ni/Mg2NiH4 exhibited better catalytic effect than Ni.When Ni loading amount is 45 wt.%,the rGO in Ni@rGO catalysts can prevent the reaction of Ni and Mg due to the strong interaction between rGO and Ni NPs. | Pengyang Yao Ying Jiang Yang Liu Chengzhang Wu Kuo-Chih Chou Tao Lyu Qian Li | 2020 | Journal of Magnesium and Alloys2020，8，2： | 4 |
| 2 | Investigation of the influence of ultrasonic stirring on mass transfer in the through-mask electrochemical micromachining process显示文摘Surface texturing is a widely accepted approach for friction reduction between mechanical components. Through-mask electrochemical micromachining is a simple and reliable process for metal surface texturing in which mass transport conditions have profound influence on final machined quality. An ultrasonic stirrer is usually adopted for mass transfer enhancement.However, understanding of the effects of ultrasonic stirring on mass transfer is limited, and is far from sufficient for developing guidelines for its practical application. In this work, the influences of ultrasonic stirring parameters on mass transfer have been investigated numerically and experimentally. With the numerical method, periodic pressure change in the electrolyte over time has been obtained, showing that ultrasonic stirring results in drastic transient pressure change in electrolyte fluid fields. Parameters related to ultrasonic frequency, vibration amplitude, and the depth of anode surface immersed in the electrolyte solution influence pressure amplitude. Validation experiments have been conducted and etched surface profile and morphology characterized,which show that the experimental observations are in agreement with numerical predictions. With the optimized mass transfer,well-defined micro-pits array of 30 μm and a smooth etched surface on tin-bronze substrate in large scale have been demonstrated. | WANG QuanDai CAI XingXing WANG Li LI PengYang XIAO JiMing LI Yan | 2018 | Science China(Technological Sciences)2018，61，2： | 3 |
| 3 | A Novel SAR Image Segmentation Method Using Run-Length Grouping显示文摘 | HU Lei JI Yan HOU Pengyang LI Bo | 2013 | Chinese Journal of Electronics2013，22，2： | 2 |
| 4 | Rapid nanopatterning technique based on monolayer silica nanosphere close-packing by spin coating显示文摘Nanoparticles monolayer formation by spin coating is considered to be a simple, fast and inexpensive nanopatterning technique. However, the parameters that govern the overall growth process in this technique are not completely quantified and techniques for the controlled and continuous growth of close packed monolayer particle arrays without defects need to be developed. In this paper, an ordered particle array formation process is analyzed theoretically, employing material flux balance and particle-subjected forces balance, based on the film thickness model of spin coating and evaporation rate law. A series of experiments were conducted using silica particle suspensions with various particle volume fractions and different spin speeds. The results show that the spin speed should match the particle volume fraction to meet the requirements of material flux and particles movement in order to obtain a close packed monolayer film. The formation mechanism of fabrication defects involving particle agglomeration and uncontrollable voids were analyzed qualitatively based on crystal growth theory, and validation experiments were performed. The formation of highly uniform close-packed monolayer films was demonstrated and the condition requirements for achieving monolayer nanoparticles array with good quality presented. | WANG QuanDai YE Lian WANG Li LI PengYang CAO Yi LI Yan | 2016 | Science China(Technological Sciences)2016，59，10： | 2 |
| 5 | Elasto-plastic indentation of a half-space by a rigid sphere under normal and torque loading显示文摘 | LI Pengyang WANG Zhanjiang LI Xiaoyong | 2013 | Tribology International2013，62，： | 1 |
| 6 | I/P interface modification for stable and efficient perovskite solar cells显示文摘Interface engineering has played an increasingly essential role in the development of perovskite solar cells(PSCs).Herein,we adopted an effective and simple one-step interface passivation method on a FA-based perovskite to fabricate efficient and stable planar PSCs.The surface defects are reduced by the perovskite interface passivation layer incorporated between the hole transport and perovskite absorber layers,and then non-radiative recombination is suppressed while interfacial carrier extraction is enhanced.The passivated planar PSCs demonstrates 20.83%power conversion efficiency(PCE),which is caused by the simultaneous enhancement of the fill factor and open-circuit voltage.In addition,the device also shows great ambient and thermal stability.It retains 94%of its original PCE after 1000 h under ambient air without encapsulation as well as90%of its initial efficiency after 400 h under continuous heating at 65°C with encapsulation.This research provides a strategy for the development of efficient and stable PSCs. | Jie Zhang Shixin Hou Renjie Li Bingbing Chen Fuhua Hou Xinghua Cui Jingjing Liu Qi Wang Pengyang Wang Dekun Zhang Ying Zhao Xiaodan Zhang | 2020 | Journal of Semiconductors2020，41，5： | 1 |
| 7 | Composite electron transport layer for efficient N-I-P type monolithic perovskite/silicon tandem solar cells with high open-circuit voltage显示文摘Perovskite/silicon tandem solar cells(PSTSCs) have exhibited huge technological potential for breaking the Shockley-Queisser limit of single-junction solar cells. The efficiency of P-I-N type PSTSCs has surpassed the single-junction limit, while the performance of N-I-P type PSTSCs is far below the theoretical value. Here, we developed a composite electron transport layer for N-I-P type monolithic PSTSCs with enhanced open-circuit voltage(VOC) and power conversion efficiency(PCE). Lithium chloride(Li Cl) was added into the tin oxide(SnO_(2)) precursor solution, which simultaneously passivated the defects and increased the electron injection driving force at the electron transfer layer(ETL)/perovskite interface.Eventually, we achieved monolithic PSTSCs with an efficiency of 25.42% and V_(OC) of 1.92 V, which is the highest PCE and VOCin N-I-P type perovskite/Si tandem devices. This work on interface engineering for improving the PCE of monolithic PSTSCs may bring a new hot point about perovskite-based tandem devices. | Bingbing Chen Pengyang Wang Renjie Li Ningyu Ren Yongliang Chen Wei Han Lingling Yan Qian Huang Dekun Zhang Ying Zhao Xiaodan Zhang | 2021 | Journal of Energy Chemistry2021，30，12： | 1 |
| 8 | Tin dioxide buffer layer-assisted efficiency and stability of wide-bandgap inverted perovskite solar cells显示文摘Inverted perovskite solar cells(IPSCs) have attracted tremendous research interest in recent years due to their applications in perovskite/silicon tandem solar cells. However, further performance improvements and long-term stability issues are the main obstacles that deeply hinder the development of devices. Herein, we demonstrate a facile atomic layer deposition(ALD) processed tin dioxide(SnO2) as an additional buffer layer for efficient and stable wide-bandgap IPSCs. The additional buffer layer increases the shunt resistance and reduces the reverse current saturation density, resulting in the enhancement of efficiency from 19.23% to 21.13%. The target device with a bandgap of 1.63 eV obtains open-circuit voltage of 1.19 V, short circuit current density of 21.86 mA/cm^(2), and fill factor of 81.07%. More importantly, the compact and stable SnO_(2) film invests the IPSCs with superhydrophobicity, thus significantly enhancing the moisture resistance. Eventually, the target device can maintain 90% of its initial efficiency after 600 h storage in ambient conditions with relative humidity of 20%–40% without encapsulation. The ALD-processed SnO_(2) provides a promising way to boost the efficiency and stability of IPSCs, and a great potential for perovskite-based tandem solar cells in the near future. | Bingbing Chen Pengyang Wang Ningyu Ren Renjie Li Ying Zhao Xiaodan Zhang | 2022 | Journal of Semiconductors2022，43，5： | 1 |
| 9 | A Track-type Inverted Climbing Robot with Bio-inspired Spiny Grippers显示文摘To enable the capacity of climbing robots to work on steep surfaces,especially on inverted surfaces,is a fundamental but challenging task.This capacity can extend the reachable workspace and applications of climbing robots.A track-type inverted climbing robot called SpinyCrawler was developed in this paper.Using a spiny track with an opposed gripping mechanism,the robot was experimentally demonstrated to have the ability of generating considerable adhesion to achieve stable inverted climbing.First,to guarantee reliable attachment of the robot on rough ceilings,a spiny gripper inspired by the opposed gripping prolegs of caterpillars is designed,and a gripping model of the interaction between spines and the ceiling asperities is established and analyzed.Second,a spiny track is developed by assembling dozens of spiny grippers to enable continuous attachment.A cam mechanism is introduced in the robot design without extra actuators to achieve stable attachment and easy detachment during continuous climbing.Finally,climbing experiments are conducted on different surfaces,using a SpinyCrawler prototype.Experimental results demonstrated stable climbing ability on various rough inverted and vertical surfaces,including concrete walls,crushed stone walls,sandpaper walls,brick walls,and brick ceilings. | Yanwei Liu Limeng Wang Fuzhou Niu Pengyang Li Yan Li Tao Mei | 2020 | Journal of Bionic Engineering2020，17，5： | 1 |
| 10 | Suppressed recombination for monolithic inorganic perovskite/silicon tandem solar cells with an approximate efficiency of 23%显示文摘Potentially temperature-resistant inorganic perovskite/silicon tandem solar cells(TSCs)are promising devices for boosting efficiency past the single-junction silicon limit.However,undesirable non-radiative recombination generally leads to a significant voltage deficit.Here,we introduce an effective strategy using nickel iodide,an inorganic halide salt,to passivate iodine vacancies and suppress non-radiative recombination.NiI_(2)-treated CsPbI_(3-x)Br_(x) inor-ganic perovskite solar cells with a 1.80 eV bandgap exhibited an efficiency of 19.53%and a voltage of 1.36 V,corresponding to a voltage deficit of 0.44 V.Importantly,the treated device demonstrated excellent operational stability,maintaining 95.7%of its initial efficiency after maximum power point tracking for 300 h under continuous illumination in a N_(2) atmosphere.By combining this inorganic perovskite top cell with a narrower bandgap silicon bottom cell,we for the first time achieved monolithic inorganic perovskite/silicon TSCs,which exhibited an effi-ciency of 22.95%with an open-circuit voltage of 2.04 V.This work provides a promising strategy for using inorganic passivation materials to achieve efficient and stable solar cells. | Sanlong Wang Pengyang Wang Bingbing Chen Renjie Li Ningyu Ren Yucheng Li Biao Shi Qian Huang Ying Zhao Michael Grätzel Xiaodan Zhang | 2022 | eScience2022，2，3： | 1 |
| 11 | Construction of the Style of Study in Colleges and Universities in the New Period显示文摘The Nineteenth National Congress of the Communist Party of China has defined the mission of educating people for our educators.The style of study reflects the education philosophy,culture and spirit of a university from the inside to the outside. Starting from the present situation and existing problems of the construction of the style of study in colleges and universities in the new period,this paper puts forward some recommendations for the construction of the style of study in colleges and universities in the new period. | Jinzhu HUA Pengyang WU Zebin CHEN Aiping YANG Li QIN Liyuan YAO | 2018 | Asian Agricultural Research2018，10，6： | 0 |
| 12 | Detachment Force of the Helical Anchor in Mitral Annulus显示文摘Helical anchors are used in transcatheter mitral valve repair,The alin of the curent study was to invest igate effectof helical anchor dsign,anchored position and biting depth on the detachment force in an in vitro eperiment.Mitral annulus was excised from 36 fresh porcine hearts and mounted in an unaxdal test ng.Seven helical anchorswere made of stainles ste based on the geometric parameters outer dlameter,wire diameter,and pich Thehelical anchors were serewedin at 3 to 9 odock positions of the psteroranuhis,namely,P3-9,and puld out.The pullout fore was measured with the maximal pullout force defined as the detachment force,The detachmentforce within the medlal ateal and central positions were comparable(p≥0.069),The detachmnen force at P6was bowest compared wih the medlal and lateral positons,and was 5.459±0.193 N,5.586±0.113 N,8.910.250 for the anchos in the outer dlameters of3,4,5 mm,respectivelyat the pitch of 2 mm and thewire dlameter of.4 mm and blting depth of 3 colls The detachment force hncreased with the outer and wiredlameters but was not fected by thepichat the bitig depthof 3 cols(@≥0.279).The detachment force of thehelieal anchor is lowest in the central posterlor annulus region,and the biting depth in 3 or more coll is rec.ommended.The helical anchor is stronger than the suture. | Ganhe Zeng Gang Li Yunchao Jia Si Chen Pengyang Chen Zhaoming He | 2021 | Medicine in Novel Technology and Devices2021，，4： | 0 |
| 13 | Influence of cadmium and copper mixtures to rhizosphere bacterial communities显示文摘To study the effects of combined Cd and Cu pollution on rhizosphere bacterial community.High-throughput sequencing was used to examine the response of rhizosphere bacterial communities to heavy-metal stress under single and mixed pollution of cadmium(Cd)and copper(Cu).With additions of Cd and Cu,the mean diversity index of rhizosphere bacterial community was in the order Cu alone>Cd-Cu mixtures>Cd alone.In all Cd and Cu treatments,the dominant phyla were Proteobacteria,Actinobacteria,Chloroflexi and Acidobacteria.In the additions with different concentrations of Cd-Cu mixtures,LEfSe indicated that there were differences in the predominant species of rhizosphere bacterial communities.Some genera such as Streptomyces and Microbacterium belonging to Actinobacteria as biomarkers were significantly enriched in both control and treatments,while some genera such as Pseudoxanthomonas and Rhodopseudomonas belonging to Proteobacteria as biomarkers were observed to be enriched in the additions with single and mixture of Cd and Cu.According to the Nonmetric multidimensional scaling(NMDS)analysis,the structure of rhizosphere bacterial community was different between treatments and the CK.Principal Component Analysis(PCA)and permutational multivariate analysis of variance(PERMANOVA)showed that there were significant differences among treatments(p<0.01),and that the addition of Cu might be the primary factor affecting the composition of rhizosphere bacterial communities. | Qirui An Yunyang Li Na Zheng Jincai Ma Shengnan Hou Siyu Sun Sujing Wang Pengyang Li Xiaoqian Li Chunmei Zhao | 2023 | Soil Ecology Letters2023，5，1： | 0 |
| 14 | Effect of nonlinear and noncollinear transformation strain pathways in phase-field modeling of nucleation and growth during martensite transformation显示文摘The phase-field microelasticity theory has exhibited great capacities in studying elasticity and its effects on microstructure evolution due to various structural and chemical non-uniformities(impurities and defects)in solids.However,the usually adopted linear and/or collinear coupling between eigen transformation strain tensors and order parameters in phase-field microelasticity have excluded many nonlinear transformation pathways that have been revealed in many atomistic calculations.Here we extend phasefield microelasticity by adopting general nonlinear and noncollinear eigen transformation strain paths,which allows for the incorporation of complex transformation pathways and provides a multiscale modeling scheme linking atomistic mechanisms with overall kinetics to better describe solid-state phase transformations.Our case study on a generic cubic to tetragonal martensitic transformation shows that nonlinear transformation pathways can significantly alter the nucleation and growth rates,as well as the configuration and activation energy of the critical nuclei.It is also found that for a pure-shear martensitic transformation,depending on the actual transformation pathway,the nuclei and austenite/martensite interfaces can have nonzero far-field hydrostatic stress and may thus interact with other crystalline defects such as point defects and/or background tension/compression field in a more profound way than what is expected from a linear transformation pathway.Further significance is discussed on the implication of vacancy clustering at austenite/martensite interfaces and segregation at coherent precipitate/matrix interfaces. | Pengyang Zhao Chen Shen Ju Li Yunzhi Wang | 2017 | npj Computational Materials2017，，1： | 0 |
| 15 | Anti-stacking synthesis of MXene-reduced graphene oxide sponges for aqueous zinc-ion hybrid supercapacitor with improved performance显示文摘Two‑dimensional MXenes with an enormous active surface area are considered to be significant cathode materials for Zn‑ion hybrid supercapacitors. However, the nanosheets are easily self-restacked during the assembly into macroscopic porous electrodes, resulting in a significantly reduced effective surface area, hindering their applications in energy storage. Here, MXenes are subtly distributed on the surface of the sponge in a coral-like structure rather than participating in the assembly of the framework, which has suppressed the self-restacking of MXene effectively, improved the hydrophilicity of the sponge, and provided fast diffusion channels for electrolyte ions. Therefore, the MXene-TiC-reduced graphene oxide sponge exhibits excellent electrical conductivity, an enormous specific surface area with abundant accessible electroactive sites, and superior electrochemical performance. The resulting sponge demonstrates an outstanding specific capacity, up to 501 mAh g–1 at 0.2 A g–1 , with excellent capacity retention (90%) after 3100 cycles as Zinc-ion hybrid supercapacitor cathodes. Furthermore, it exhibits an elegant gravimetric energy density of 486 mWh g–1 at 415 mW g–1 , which has surpassed most leading MXene-based Zn-ion cathodes. This work provides a new synthetic idea for MXene-based macro-composites and paves a new avenue for designing next-generation flexible and portable porous electrodes with high gravimetric and rate performances. | Zonglin Liu Fuhua Xue Xu Zhao Zhong Chen Haowen Zheng Renjie Ding Pengyang Li Liangliang Xu Jinhua Xiong Qingyu Peng Xiaodong He | 2023 | Journal of Materials Science & Technology2023，，23： | 0 |
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